Rocksteady developing a game that will make people "lose their minds".

Rocksteady’s Marketing Game Manager, Gaz Deaves, has recently put a tease on Twitter that there will be a new game on the horizon and it will apparently make people “lose their minds”.
Of course a lot of fans are asking about news on the studio’s next project. Sadly, he can’t reveal anything in particular just yet but has said, “when we do, people are going to lose their minds.” Although Deaves was unable to reveal any specifics, what we do know is that it is very unlikely that it will be another Batman Arkham game.

What do you think the news could possibly be?